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https://issues.apache.org/jira/browse/OPENJPA-1551?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Michael Dick resolved OPENJPA-1551.
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Resolution: Fixed
> Allow connectionFactoryName to be specified when creating an EntityManager
> --------------------------------------------------------------------------
>
> Key: OPENJPA-1551
> URL: https://issues.apache.org/jira/browse/OPENJPA-1551
> Project: OpenJPA
> Issue Type: Improvement
> Components: jpa
> Reporter: Michael Dick
> Assignee: Michael Dick
> Fix For: 2.0.0
>
> Attachments: mylyn-context.zip
>
>
> Some application utilize the same table definitions across a several schemas
> or separate database instances to isolate customer data.
> A pure JPA solution to this problem would be to create a separate
> EntityManagerFactory for each schema & database instance. This approach
> scales poorly, and results in a lot of duplicate processing time, and memory
> used.
> As an alternative we could provide the ability to specify the
> connectionFactory to use when the EntityManager is created. Effectively this
> allows the EntityManagers to share a MetaDataRepository but communicate with
> different databases.
> There are some limitations to this support, obviously the table definitions
> must be identical for each database used, if the OR mappings include a schema
> that schema must exist (and be writeable) in each database come to mind, but
> in the long run for applications which follow this specific pattern this
> function could be a large benefit.
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